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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '55b895f607be630181b95fe87128abe5673e9ce47187f1537a5877efbf4ed7c1' 
  AND token = 'KIDd5ztcll3dSYYJ6Yx36ADtuY0Ji8r1esWs4zPOo+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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