Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae425e36c26a4a1f0608d2b28a33da6ce6c93203132cade1cbb6161f03b9c426' 
  AND token = 'VI7Aj+d702RRDTpCgL8oaQVY0WW1Qw/ea5OKfzAOdmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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