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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be02628460f2e67a11a7f7f6cddaa62d2bf4369c71b75eea51b7a8a3bbab577b' 
  AND token = 'IzbLW76Vv70tk9r5PcPdB9hgme6Zs8X5m2iBZFhB47M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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