Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea3b6fc1387b12ad795ecbb4c7ffab3cb080f0338b031fd7a3ee983e4dabfeef' 
  AND token = 'lJLHEQVpYK7dWn9MgVWTbCZhvaDQ4x+iynH5Ofp67+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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