Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acc72a9450770a8995ec8357d2aec267d9baea4c6513d6d3dd1d16271a473a01' 
  AND token = 'l6M5MVs6Ms9OyrD6X9qFANPOAiBbu0V+L7oaq//2Pm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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