Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '42b7ca4a61a3d98759adbf791bcd71bfc4548af1811d1826fe144935c87ac71f' 
  AND token = 'W7utyhUUdHljvmIjlyUJG21Gv4Wl5y6MVjgCp7QrOkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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