Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55c85a8aa6b11ebe1c1ff4b6a8eb649a73c1202233b00f955a9d4305cfc583ab' 
  AND token = 'L3r9RjWA1F9WKVQNHlswVvSU1G3HuvDnlli48tCrUSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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