Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0e1d17506a2560cf51df46f7b28105e8e4dc36b1737d5214ef7699ec2326fda' 
  AND token = 'idLSc5bWVohts7+8Z0nCs/3tPQ4rEDRGpdSc3vghvcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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