Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67bd8bb50cf6a756d66a0a89e93883de880d78bd7fbf1a194c0f3ae5c0e62bbb' 
  AND token = 'o0rsfOl6Ty+VJnv+yWrTDan9U6REZlq/gslicSHPb0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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