Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd2c2e8de91496433c5dbe1aeae4292540243b638c712c77cdfac236063b6c9' 
  AND token = 'immjc2YElF0Hg/I1P4a/9SRd5SwFMJfecxfFeJsDUds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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