Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40fc7f2dd8fb3bf207bbabbfb1fa9db66e1b68f8c43bfe924b97414fa571c934' 
  AND token = '8jGoywQkAL9YkO656xYi2voxEjlGnMS5xO8LW5SBjRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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