Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '389ba87ef1b20c5c2170f68a40a1979df66269fd1322a1745ed9dfa66b940940' 
  AND token = 'kBh/Vl2Eg7O9wT6PIiMit8NbySoOMgDRcuxEV6GGkjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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