SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdb1edb8866b88a27479f62491ab4cf3390ebc264b7e4793514981c09ca6189a' 
  AND token = '7j16YPH5rZAuAIJpmyNlJS5Y0RvaygbiqLBMNwRXf/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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