Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89fc5282505211e7011bf2dcb954b3a195ce9b7adaad25ca3d14c05ae6d30bc7' 
  AND token = 'nvmK7Arv2kHPY5GXOFEyjHgdnHPh5UmTq0YyC6E4b9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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