Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '105507f3c9df490883eb95f7a5a320b481829579c45508d89e9d0aa767b3ff36' 
  AND token = '5acvX9UDEy5vJa1MLYPwhfgFfsVteyYPNhjSegYsFc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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