Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37099abde38981e9c047e17de78e53c824ae078b83b1278141183b1137c180c7' 
  AND token = 'aAvH6Y4m/VGCecH3vAUsNwHg5WLWF44KLUuW/9BZ3WU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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