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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '384330d4ae0b10b7c5f2cecdd84d44aeb2592febd69e0a9baf6bda31cdbcfb0c' 
  AND token = '+92/DS1pIK0mLLYEQL+HGIJceSB006c6N9Uc99WRRWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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