Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e09a89a826cb75c674a0407ed6a5ef76861ff88bf76119295854d090ffe18e' 
  AND token = 'y6pLzwHH4t/kRXQ8tvzdEQeOorQ+loc392ZVKbWCnUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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