Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d264d0724279cfa3c9bf8996d862b04281e0d42dd08cbb264d9ea21aed898d3' 
  AND token = 'EahOCRgXj4+bHbZNEqN3rHBTWP+dLqX4ps7HR+cyVe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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