Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '370188681e73dfcfa80066440b6f8d10d7bbe8092506f5198843efc7dc94aae2' 
  AND token = 'HDwhIzpC2UeWNwWjoHCWFYudDT26OJ4rhAyMSkktuEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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