Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74c7234a1d574b46bd6f003c64f5d5779189ac13def96ecb7746d39b259f4fa7' 
  AND token = 'PgCarx+/aNIDZt214oMOEr7N9kKWP1dWWQ4Xb+H7WO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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