Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e61013257e06fdc01c6f3666f63d57004c7944a7869fe5027f94b1ce0ba8d6e' 
  AND token = 'o5xi+cxkBYWU/5uSO4bnYjBCWhxGb7OhbLn6AmCNTnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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