Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a2df7665096b3b207091abe5e5d4734c462ea89793724c686666369e5d00f87' 
  AND token = 'XQk2DTWZYCGIxL7wuB3LseRj9SQX6fmO2lj1hEoTYRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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