Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9f18c11579153af35f449140375d0ff010b04650218d0b1403906a807f473d5' 
  AND token = 'bZ+1lxawK0f9nUM0UfYlvBVXmJPLsCwfltJYGQ7st6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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