Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72a1baeec0cf52b2c986a5ccac5aa15cb0c2067a6a5733ee88e6aab997e1c747' 
  AND token = '5jQ66H2lwFh7FV1RZE1wG20rizZsAs9D0f47JRAapT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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