Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ced2c3f272a7bbdd49682f57a880c799565f2b5ef6c9ccdf02c20867ba7b79f1' 
  AND token = 'HHCxA1uPMx7AE2wu83epbp4zl+AUk7B91WO1/mka/Ok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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