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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a481600630a0cfa5598e613d487f60d0cdff7aa28f5315a3f66924d89fb6f12' 
  AND token = 'tUdV859z5Irr6VO/M8Jzpd34FoA/9sVqMc1qigkNHGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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