Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7d38fabc98ac5b70b1986d7e912fbf3fd1fb0ab0a842f2de6fcd996874cb6e82' 
  AND token = 'Blclo2Y5u0fLlOYCVUo0vIzSO8ZLvt7l+dQYTb/0D94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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