Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c239e13566c80cdffdbe0f6cef9beb2c5bebb4c041cac990db6d36e64dc86c9' 
  AND token = 'GOlcSGLO/ydRbr+wBqwfuMhftsYcYazCMR77zulPzvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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