Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2a4c065216cff9a67d86d5a8429dad0c960fce1f499d3ad89d175e0a6f4a7c2' 
  AND token = 'jiiffjbuPJWTV7cR4UaJuu2AIR/eKfV0Z0cApmC8dUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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