Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7cb3b05ad800c37b6843d93d14eaf130f0c1a2e1b6e33f33540fc6cdbd11de4' 
  AND token = 'fKXG4fc1JWSCjLzmPSXpHHCmJR/5XgLLYsjOhePC+3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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