Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652ca60b4e6ac049d6e0581a6063874bb5816bfa5a2f9a4bab4af0f8a2c89162' 
  AND token = 'LqYpff8UCxBRORmYFp/aVGGJvbPskq8sy9vVvbG5+X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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