Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f76f17abf6f4568448e536e22a71957550afb5825ac19beb09e8d693e1abe40a' 
  AND token = 'fp7T1Lp5tbL69+bi3dpbs6nptvbg1p4XPEWFpJiZv00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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