Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3da599fd7678f90604a4763ec04681f0e85d56ce837948c3ba7e4c03cca0e6e' 
  AND token = '6+1Xe91xb8ti4taTYDYN1pxcTYpLZpoX1WzNQyMaavs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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