Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42d8e6b37ffdbf37d4f672b96004ad0c892b8cdff380e9fa0b065b6acf13b81d' 
  AND token = 'pFwG8V1mqDravZyOowd3EbvWD+TMBL4YHyQDgYx42yY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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