Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '446a91dbc1ffb97e68d9b733636b5700f868f5f37d6fce9a7df315c0ed170f81' 
  AND token = 'zi88SE53L3MZ1E3pJwzrAkrWBOA70381gfGEVM2Uepc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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