Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22d3a2fccdb19a2c749d481dca6051dfb1f68dc15359623bba2aa3945cfba354' 
  AND token = 'lwif+k1luy0vyFDUnuPLopIVH1BMOMDqsDNCSduVJtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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