Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e8887c7cda5321840d3a7ebedc608d7c845e257c6469b909da5c083ef9da692' 
  AND token = '7L++1MzmacniqnyBBBoPFNjshdAvfx7Luwd0ntJqcfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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