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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8018e9a75f757c2737c98564f67ef90611d0014c98c741cd8a3e32b2030dfdfd' 
  AND token = 'tBlnWP1cD+Nts5Rop4E0dNv6uTDbCwlpVtlAFF3A3Kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00316

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}