Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb6ee55db3bbe64c731d02b00c6112647a62a32c03b514da244a47484cfd5db7' 
  AND token = 'I8gOUMK4XnkL68xOP3qISpIxlAnSE5aL7kj1GuyUKnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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