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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2d765d80e6eebf44a28c7fa695bc9773836cef5bfc3b2e505f0afdd2d6cb5014' 
  AND token = 'vQiDs5cVadm86Pf/WnHSVNtY3BP83kQ7307kVXXbx0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}