Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6396a2b703166546f9110a2b9f2da957bad0f91dea95188ffaa05ed01d45af59' 
  AND token = 'c44Qjrisc598KWi6F3dX30qoFHLZPWakJoJamvC1Qag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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