Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '912fd42f3448206c87fa13568c84ca80d907c354d56ca3b302776043034cbda0' 
  AND token = 'JTIqwSMNIzHBlMMNCgkX+1aRJx/+Deb0RWJTQ7+FCIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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