Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '234f83bb2230f906f1a858f227f419f762dff896a915aaff2d116b1f56616797' 
  AND token = '1p+rWet9b7DeAGkIuvv6QokK5/hnzsN8jQlIW+u0FcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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