Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '528060ce34665b8b62d4f3c4befb8f3d65be0510141140c521cd5313d4c30821' 
  AND token = '69C1Vi4oE+n4VJgLXcAgIpSAEoSOcI8KMbb0RIxYsR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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