Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '732504a910f34b60a102913000fd6d48835bb4b00e43c6a0ea4a1a1948a8c1ae' 
  AND token = 'dYU/G0jU5CKqQ1Mm9HPqs6+oeqG8Ho5NUazAs4J/ZBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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