Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1773d42590ec76d08ab71dae20717788efa009c535025e2ce460b8d81ec8cace' 
  AND token = '0sc0gTwOsEIdmMpSbuJ+9u8xlA3hgcMr3rXTaIqz5C4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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