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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f6248fcf4a5cd7a11c3f1e1169375ef24a5a64ff5a625b6787b5a5cf5be6cce' 
  AND token = 'ZtY2beZyF4pRyTwzZx8hH+3hkw8AjS0FIzMlcMdW2Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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