Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72cce1f22146000feca839ef6cadc37b7c878c5e2822cd5bf9139ab9b6ca89a' 
  AND token = 'AFP4JIFcSVAfr7vyZEKyltYe+AdB1pweRC5Ji5XHPZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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