Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5b05203103b7f02b3a32d85228bf3223b98a2c78495fcb7fd0be47fdb95e3fa' 
  AND token = '+gR2om04UkH2LAj5Vxl7629y4byr7OPn61sARAI1khg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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