Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99192bc047530bdaf252c07e0e5355c0e61f25c492784763fcb997cfd753cd89' 
  AND token = 'RaGKejv7Gt3AfIY+5w1c68+Q1Rkt1X9FcBlWvh39nAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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