Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4860432fcaa37c79aa3696eda02537bf6947bb357e719380c45558d39b5679a' 
  AND token = 'cqZjra8YQomCQ5LXy5g9RFNu+TfbiSPiZdQqa4rAR3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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