Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b96f623e84261fc03dbe5d2d0b109fd19cf795ac904b11858bd4abd76222afb' 
  AND token = 'm6tjYDt4IGD+ksYdn5bizGHFkBjL8/tGfsUeLrBldOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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