Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a71b4c06eaacd6fd2987d63b34efa9a11102af99e0b93412246ba70cb543c92' 
  AND token = '0G7aOwU2q6XLJuvHxv6mDSA6vN9u69s4AMJehkly5V8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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