Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00578915ba8ffe60e78de5f02b4d57ab43778e46de396700057ae1fbe709afd7' 
  AND token = 'N4XZgj36QV1MzsH1bu7CUHkFDXIRcrUmOMNEQNsHJd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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