Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd304574f943a5eefd3cd5e6c8ba7e3a6cc71d4478ceaf9cebad75afec65762f2' 
  AND token = 'aAlAPFQUfa35n30M24yU4ta/4Mrj3L965COakEAtVgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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