Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deaf59ea1cb81e33df667bb8b7055c1500722e0cc8e55e2ff0d1d2387f0993ac' 
  AND token = 'HHlzTg5JZ2+iLAZhyVglCMWpddV35VNxch7w9jl3FmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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