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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6c1428916839ba0594762c5df77eedf3c1ca04dc1c2b0182b82a957f4f306c87' 
  AND token = 'raQLE+vzhaotNinBrJTML+GCxunUbEmopTE3Vcckf0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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