Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66ffd61d13c16e5a5f779e9620b35bef6044eecf7aae7076dd1305fc3ce6503a' 
  AND token = '3EWhzcsC1EacaPO9prSPCrvWm4miSWXtiLAkQZBpnZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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