SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9051ccee54e4d266b79c7b2a496b424358a2d516abdc10a4e69ffb661642b24' 
  AND token = 'q/z+7zBY5I7aPv0+wYTnkGKDjpbJKzP/TLrijkZv8PQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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