Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d2794486755608b820d360ccad5cf2c445da68b082b97e7bb7ac62d3e099561' 
  AND token = 'nN/dsGEX1+ACa/u7N+IqbqhjLlomD4o0TtzArat7Jgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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